Question 1

As the spatial resolution of a DEM decreases, the number of sinks

Accepted Answer

A)  increases 
B)  decreases 
C)  have no change 
A)  increases 
B)  decreases 
C)  have no change A

Question 2

To answer the question 'how can an aesthetically unpleasant building be optimally hidden in the terrain in order to preserve the beauty of a landscape?', it is better to use

Accepted Answer

A)  viewshed analysis 
B)  line-of-sight analysis 
C)  overlay 
D)  buffer 
A)  viewshed analysis 
B)  line-of-sight analysis 
C)  overlay 
D)  buffer A

Question 3

Flow accumulation is calculated based on

Accepted Answer

A)  amount of rain flowing through each cell 
B)  amount of water accumulated from upstream areas 
C)  flow direction 
D)  flow length 
A)  amount of rain flowing through each cell 
B)  amount of water accumulated from upstream areas 
C)  flow direction 
D)  flow length C

Question 4

Slope is measured either in degrees or percentage. 45 degree is equivalent to

Accepted Answer

A)  1% 
B)  45% 
C)  100% 
D)  none of the above 
A)  1% 
B)  45% 
C)  100% 
D)  none of the above

Question 5

Below is a DEM. Which landform is at Locations labelled as 1? g

Accepted Answer

A)  hill tops 
B)  ridges 
C)  valleys 
D)  steep slopes 
A)  hill tops 
B)  ridges 
C)  valleys 
D)  steep slopes

Question 6

Sinks in a DEM are not caused by

Accepted Answer

A)  sampling effects 
B)  rounding of elevations to integer numbers 
C)  spatial variations in the DEM 
D)  natural depressions on terrain surface 
A)  sampling effects 
B)  rounding of elevations to integer numbers 
C)  spatial variations in the DEM 
D)  natural depressions on terrain surface

Question 7

The flow direction tool in GIS calculates

Accepted Answer

A)  the direction water will flow along a stream channel 
B)  the direction water will flow into a catchment 
C)  the direction water will flow out from a catchment 
D)  the direction water will flow out from each cell 
A)  the direction water will flow along a stream channel 
B)  the direction water will flow into a catchment 
C)  the direction water will flow out from a catchment 
D)  the direction water will flow out from each cell

Question 8

Which of the following is not well represented using TIN?

Accepted Answer

A)  glaciated landscapes 
B)  fluvially eroded landscapes 
C)  mountainous landscapes 
A)  glaciated landscapes 
B)  fluvially eroded landscapes 
C)  mountainous landscapes

Question 9

The topographic wetness index is a function of

Accepted Answer

A)  elevation 
B)  slope 
C)  aspect 
D)  catchment size 
A)  elevation 
B)  slope 
C)  aspect 
D)  catchment size

Question 10

The flow length tool in GIS with UPSTREAM option calculates

Accepted Answer

A)  downslope distance along a flow path from each cell to a sink or outlet on the edge of the catchment 
B)  longest distance along a flow path from each cell to the top of the divide of the catchment 
C)  length of each stream channel within the catchment 
D)  shortest distance from the highest point to the outlet of the catchment 
A)  downslope distance along a flow path from each cell to a sink or outlet on the edge of the catchment 
B)  longest distance along a flow path from each cell to the top of the divide of the catchment 
C)  length of each stream channel within the catchment 
D)  shortest distance from the highest point to the outlet of the catchment

Question 11

In the following flow accumulation map derived from the above DEM, ridge lines can be formed by linking locations with a flow accumulation value of

Accepted Answer

A)  1129 
B)  1000 
C)  100 
D)  0 
A)  1129 
B)  1000 
C)  100 
D)  0

Question 12

A hydrologically correct DEM is

Accepted Answer

A)  a hydrological model 
B)  a DEM corrected using a hydrological model 
C)  a DEM void of depression or sinks 
D)  a DEM resulted from hydrological analysis 
A)  a hydrological model 
B)  a DEM corrected using a hydrological model 
C)  a DEM void of depression or sinks 
D)  a DEM resulted from hydrological analysis

Question 13

In order to answer the question 'can a tower in the terrain be seen from a given viewpoint?', which of the following GIS operations is the best?

Accepted Answer

A)  viewshed analysis 
B)  line-of-sight analysis 
C)  slope measurement 
D)  aspect measurement 
A)  viewshed analysis 
B)  line-of-sight analysis 
C)  slope measurement 
D)  aspect measurement

Question 14

TIN is more efficient than DEM at representing a surface

Accepted Answer

A) True 
 B)False

Question 15

If a plateau is eroded by gullies, the remaining plateau would be a flat (planar) area bounded by an irregular, many-sided polygon. In the TIN model

Accepted Answer

A)  it would be represented by the irregular, many-sided polygon 
B)  it would be represented by a number of triangles, each at a different elevation 
C)  it would be represented by a number of triangles, each at the same elevation 
D)  it cannot be represented 
A)  it would be represented by the irregular, many-sided polygon 
B)  it would be represented by a number of triangles, each at a different elevation 
C)  it would be represented by a number of triangles, each at the same elevation 
D)  it cannot be represented

Question 16

On a flow accumulation raster layer, locations having an accumulation value of 0 correspond to

Accepted Answer

A)  stream channels 
B)  ridge lines 
C)  pour points 
D)  none of the above 
A)  stream channels 
B)  ridge lines 
C)  pour points 
D)  none of the above

As the spatial resolution of a DEM decreases, the number of sinks

To answer the question 'how can an aesthetically unpleasant building be optimally hidden in the terrain in order to preserve the beauty of a landscape?', it is better to use

Flow accumulation is calculated based on

Slope is measured either in degrees or percentage. 45 degree is equivalent to

Below is a DEM. Which landform is at Locations labelled as 1? g

Sinks in a DEM are not caused by

The flow direction tool in GIS calculates

Which of the following is not well represented using TIN?

The topographic wetness index is a function of

The flow length tool in GIS with UPSTREAM option calculates

In the following flow accumulation map derived from the above DEM, ridge lines can be formed by linking locations with a flow accumulation value of

A hydrologically correct DEM is

In order to answer the question 'can a tower in the terrain be seen from a given viewpoint?', which of the following GIS operations is the best?

TIN is more efficient than DEM at representing a surface

If a plateau is eroded by gullies, the remaining plateau would be a flat (planar) area bounded by an irregular, many-sided polygon. In the TIN model

On a flow accumulation raster layer, locations having an accumulation value of 0 correspond to

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Exam 7: Terrain Analysis

As the spatial resolution of a DEM decreases, the number of sinks

To answer the question 'how can an aesthetically unpleasant building be optimally hidden in the terrain in order to preserve the beauty of a landscape?', it is better to use

Flow accumulation is calculated based on

Slope is measured either in degrees or percentage. 45 degree is equivalent to

Below is a DEM. Which landform is at Locations labelled as 1? g

Sinks in a DEM are not caused by

The flow direction tool in GIS calculates

Which of the following is not well represented using TIN?

The topographic wetness index is a function of

The flow length tool in GIS with UPSTREAM option calculates

In the following flow accumulation map derived from the above DEM, ridge lines can be formed by linking locations with a flow accumulation value of

A hydrologically correct DEM is

In order to answer the question 'can a tower in the terrain be seen from a given viewpoint?', which of the following GIS operations is the best?

TIN is more efficient than DEM at representing a surface

If a plateau is eroded by gullies, the remaining plateau would be a flat (planar) area bounded by an irregular, many-sided polygon. In the TIN model

On a flow accumulation raster layer, locations having an accumulation value of 0 correspond to

GIS Overview

Spatial Data and Data Management

Spatial Data Input and Manipulation

Spatial Analysis

Spatial Data Exploration With Statistics

Remote Sensing Data Analysis

Spatial Visualisation

Spatial Modeling and Decision Analysis

Environmental Applications of GIS

Filters